im not sure whether i should be concerned or not but...

when my truck is fully warmed up, and its idling, the idle speed goes up and down consistantly. Not missfiring, or running rough, its just that the rpm's go up and down around 600.

Is this anything to be concerned about?

Thanks everyone!

 

check your idle air control motor. They seem to get stuck often. Clean up and make sure it moves freely.

 

yeah, i though it had something to do with that...im gonna run a little seafoam through it too.

Thanks crazy